Delta OHM HD45 Series Manual page 53

Parameter storage (function 05h)
Function code 05h allows the permanent storage of any changes made to parameter
values. Parameter changes performed with Write functions (functions 06h
and 10h) actually modify only values in the RAM memory and are therefore
deleted in case of instrument power supply failure.
Storage is associated with a number, as described in Table 8.E.
Tab. 8.E: Storage command
Command
number
0003 Parameter permanent storage
The command address, followed by the fixed value FF00h is indicated in the request
data field.
Since, in the protocol, registers are numbered starting from 1, but data are addressed
starting from 0, a register address is equal to the register number decremented by 1.
The response format of the instrument is equal to the request format. Therefore,
command and response Function and Data fields have the following format:
Command
Value
Function: 05h
Data: 0002h
FF00h
Response
Value
Function: 05h
Data: 0002h
FF00h
Only parameters changed within command transmission are permanently stored, any
changes made afterwards require a new transmission of the command in order to
make them become permanent.
The execution request of a command that is not present in table 8.E generates an
error response from the instrument.
Changing a single configuration parameter (function 06h)
Function code 06h allows to change a single parameter value in the instrument.
The configuration register address containing the parameter to be changed and the
new parameter value are indicated in the request data field.
Since, in the protocol, registers are numbered starting from 1, but data are addressed
starting from 0, a register address is equal to the register number decremented by 1.
The response format of the instrument is equal to the request format. Therefore,
command and response Function and Data fields have the following format:
Command
Length Description
1 byte Commands execution
2 bytes Command address (= number - 1)
2 bytes Fixed value
Length Description
1 byte Commands execution
2 bytes Command address (= number - 1)
2 bytes Fixed value
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Notes
Ver.
FW
1.07